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Proceedings Paper

Assessment of FLD-based algorithms for the retrieval of vegetation solar-induced fluorescence from the in-filling of the telluric O2-A and O2-B lines
Author(s): Lorenzo Palombi; Paola Di Ninni; Donatella Guzzi; David Lognoli; Vanni Nardino; Ivan Pippi; Valentina Raimondi
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Paper Abstract

This study evaluates the performances of different algorithms for the retrieval of solar induced fluorescence of vegetation in both the telluric O2-A and O2-B bands of the atmospheric molecular oxygen, respectively at 760 nm and 687 nm. In particular, we evaluated the performances of three algorithms amongst those already applied by the scientific community: two of them are based on the use of two or three spectral bands (sFLD and 3FLD methods), while the third one exploits the information content of all the spectral channels in certain bands by applying a polynomial model for fluorescence and reflectance (SFM method). These were applied to a synthetic set of fluorescence data corresponding to different types of vegetation. The main technical specifications of the spectroradiometer have been outlined in terms of three different airborne operating scenarios, addressing different flight altitudes and speeds chosen on the basis of typical platforms suitable for operation from low-medium altitudes. The results underline that the high spectral resolution of the instrument plays a fundamental role for the determination of the value of fluorescence with a good precision and accuracy, as expected. Nevertheless, the extraction of the value of fluorescence in the O2-A band is less critical than in the O2-B band and, specifically, it is less sensitive to the spectral resolution of the spectroradiometer. Even at low spectral resolutions, however, the retrieval algorithms based on polynomial fitting provided better results than methods based on the use of spectral bands.

Paper Details

Date Published: 24 October 2013
PDF: 8 pages
Proc. SPIE 8889, Sensors, Systems, and Next-Generation Satellites XVII, 88891S (24 October 2013); doi: 10.1117/12.2030185
Show Author Affiliations
Lorenzo Palombi, CNR-Istituto di Fisica Applicata Nello Carrara (Italy)
Paola Di Ninni, CNR-Istituto di Fisica Applicata Nello Carrara (Italy)
Donatella Guzzi, CNR-Istituto di Fisica Applicata Nello Carrara (Italy)
David Lognoli, CNR-Istituto di Fisica Applicata Nello Carrara (Italy)
Vanni Nardino, CNR-Istituto di Fisica Applicata Nello Carrara (Italy)
Ivan Pippi, CNR-Istituto di Fisica Applicata Nello Carrara (Italy)
Valentina Raimondi, CNR-Istituto di Fisica Applicata Nello Carrara (Italy)


Published in SPIE Proceedings Vol. 8889:
Sensors, Systems, and Next-Generation Satellites XVII
Roland Meynart; Steven P. Neeck; Haruhisa Shimoda, Editor(s)

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